In a bowl of your stand mixer, cream softened butter and sugars together. ( I use salted butter so I don't have to measure out salt)
Add eggs and vanilla. Beat until smooth.
Add baking soda and cream of tartar
Add flour 1/2 - 1 cup at a time, stirring in between additions so you don't pouf flour everywhere!
Chill dough in refrigerator for at least 30 - 60 minutes.
Combine topping sugar and cinnamon together in a small bowl.
Using a cookie scoop, scoop out balls of dough and roll in the cinnamon/sugar mix.
Place on un-greased cookie sheet. ( I also use silicone baking mats for easy clean up)
Bake for 12-14 minutes depending on your oven.
adapted from ThirtyHandmadeDays.